45

Học thuật
Thân thiện
Definition
  1. Adjective: Being five more than forty; the cardinal number following forty-four and preceding forty-six.
Usage
  • As a determiner or quantifier: Used to indicate a quantity of forty-five items.
    • There are 45 students in the class.
    • The recipe requires 45 grams of sugar.
  • As a noun (representing the number itself): Used to refer to the numeral or the quantity it represents.
    • Multiply nine by five to get 45.
    • Her jersey has the number 45 on it.
Advanced Usage
  • .45 (pronounced "forty-five" or "point forty-five"): Commonly refers to a .45 caliber firearm, most notably the Colt M1911 pistol.
    • The detective carried a .45 for protection.
  • 45 (pronounced "forty-five"): Refers to a type of vinyl phonograph record that plays at 45 revolutions per minute (RPM), typically containing a single song.
    • He collects classic rock 45s from the 1960s.
Variants and Related Words
  • Forty-fifth (45th): The ordinal form, indicating position in a sequence.
    • She finished in forty-fifth place.
  • XLV: The Roman numeral for 45.
Synonyms
  • Forty-five
  • Forty plus five
  • Nine times five
Related Phrases
  • 45 rpm: A standard speed for playing vinyl records.
    • Make sure the turntable is set to 45 rpm for this single.
  • .45 ACP (Automatic Colt Pistol): A specific type of ammunition cartridge.
    • This pistol is chambered for .45 ACP.
Adjective
  1. being five more than forty